WDM网状网中双链路失效的保护设计

本文研究了WDM网状网中双链路失效的动态共享链路保护设计问题,提出了一种新的启发式算法TBP (Two Backup Paths) 和一种改进的启发式算法OBP (One Backup Path).两种保护算法都能根据当前网络状态动态地动态调整链路代价,所选路由都是最小代价的路径.文本还研究了双链路失效的保护切换时间,详细描述了保护切换过程.仿真表明,(1)两种算法都能有效地保护双链路失效;(2)TBP的性能优于OBP;(3)与其他算法相比,TBP具有最快的保护切换时间.

Protection Design for Double-Link Failures in Meshed WDM Networks

The paper studies the protection design with link shared for the double-link failures in WDM mesh networks,and proposes a novel heuristic algorithm called TBP (Two Backup Paths) and an improved heuristic algorithm called OBP (One Back Path).The two algorithms both can dynamically adjust the link-cost according to the current state of the network,so that the paths are all the least-cost routes.The paper also investigates the protection switching procedure and calculates the formula of the protection switching time.The simulation results show that,1) the two algorithms both can effectively protect the double-link failures; 2) TBP performs better than OBP; 3) with respect to other algorithms,TBP has the fastest protection switching time.